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Finding the Fourth Proportional to 68,565.20, 102,886.20 and 29,115.60

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Solution

The fourth proportional to 68,565.20, 102,886.20 and 29,115.60 is: 43,689.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,565.20 : 102,886.20 = 29,115.60 : x
  2. Step 2: Convert to fraction form
    68,565.20/102,886.20 = 29,115.60/x
  3. Step 3: Cross multiply
    68,565.20x = 102,886.20 × 29,115.60
  4. Step 4: Simplify right side
    68,565.20x = 2,995,593,444.72
  5. Step 5: Solve for x
    x = 2,995,593,444.72/68,565.20
  6. Step 6: Final answer
    x = 43,689.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.